[vcpkg] fix extern C around ctermid (#11343)

Additionally, move the system_header invocations to their own header file,
<vcpkg/base/system_header.h>

2 files changed, 7 insertions, 15 deletions

diff --git a/toolsrc/src/vcpkg-test/system.cpp b/toolsrc/src/vcpkg-test/system.cpp
index 6b9dfaf95..6e87f9b3e 100644
--- a/toolsrc/src/vcpkg-test/system.cpp
+++ b/toolsrc/src/vcpkg-test/system.cpp
@@ -1,4 +1,4 @@
-#define _POSIX_C_SOURCE 200112L
+#include <vcpkg/base/system_headers.h>
 #include <catch2/catch.hpp>
 
 #include <string>
@@ -8,14 +8,6 @@
 #include <vcpkg/base/strings.h>
 #include <vcpkg/base/system.h>
 
-#if defined(_WIN32)
-#define _NOMINMAX
-#define WIN32_LEAN_AND_MEAN
-#include <windows.h>
-#else
-#include <stdlib.h>
-#endif
-
 using vcpkg::Optional;
 using vcpkg::StringView;
 using vcpkg::ZStringView;
diff --git a/toolsrc/src/vcpkg-test/util.cpp b/toolsrc/src/vcpkg-test/util.cpp
index 8ead355f1..ce38e62e4 100644
--- a/toolsrc/src/vcpkg-test/util.cpp
+++ b/toolsrc/src/vcpkg-test/util.cpp
@@ -1,3 +1,5 @@
+#include <vcpkg/base/system_headers.h>
+
 #include <catch2/catch.hpp>
 #include <vcpkg-test/util.h>
 
@@ -20,15 +22,13 @@
 #define FILESYSTEM_SYMLINK_UNIX 1
 #define FILESYSTEM_SYMLINK_NONE 2
 
-#if defined(__cpp_lib_filesystem)
+#if VCPKG_USE_STD_FILESYSTEM
 
 #define FILESYSTEM_SYMLINK FILESYSTEM_SYMLINK_STD
-#include <filesystem> // required for filesystem::create_{directory_}symlink
 
 #elif !defined(_MSC_VER)
 
 #define FILESYSTEM_SYMLINK FILESYSTEM_SYMLINK_UNIX
-#include <unistd.h>
 
 #else
 
@@ -169,10 +169,10 @@ namespace vcpkg::Test
 #if FILESYSTEM_SYMLINK == FILESYSTEM_SYMLINK_STD
         if (can_create_symlinks())
         {
-            std::filesystem::path targetp = target.native();
-            std::filesystem::path filep = file.native();
+            fs::path targetp = target.native();
+            fs::path filep = file.native();
 
-            std::filesystem::create_symlink(targetp, filep, ec);
+            fs::stdfs::create_symlink(targetp, filep, ec);
         }
         else
         {